56664688 has 20 divisors (see below), whose sum is σ = 115566760. Its totient is φ = 26841024.

The previous prime is 56664679. The next prime is 56664697. The reversal of 56664688 is 88646665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56664679) and next prime (56664697).

It is a super-2 number, since 2×56664688² = 6421773732274688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92895 + ... + 93502.

It is an arithmetic number, because the mean of its divisors is an integer number (5778338).

Almost surely, 2^56664688 is an apocalyptic number.

It is an amenable number.

56664688 is an abundant number, since it is smaller than the sum of its proper divisors (58902072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56664688 is a wasteful number, since it uses less digits than its factorization.

56664688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186424 (or 186418 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The square root of 56664688 is about 7527.5951006945. The cubic root of 56664688 is about 384.0939801803.

The spelling of 56664688 in words is "fifty-six million, six hundred sixty-four thousand, six hundred eighty-eight".